Beerangi Medu, where a 17th century forge-welded iron cannon is mounted at Keela Alankam in Thanjavur.

The cannon is said to be one of the biggest in the world. It is of amazing size and speaks volumes of the metallurgical skill of the people in 17th century. The cannon has been made using Danish technical skills, 26-foot-long cannon weighs 22 tones. It is forge-welded and has not been made by casting, nearly 400-year-old cannon. It was mounted in 1620 when Ragunatha Nayak was the King of Thanjavur (1600-1645 A.D.).

Rajarajan Mani Mandapam was built during the 8th World Tamil Conference . It is having a beautiful garden.
Rajarajan Site Museum-Thanjavur
Rajarajan Site Museum was established in the year 1984 as part of the celebration of Rajarajan’s 1000th birth centenary.